vtgl

Commit: 49a37f7810f1bd42c2f6cc1f9cd6c59a1d117030
Parent: ee916f134c6c34eb080b89ece95aba84d48d58f3
Author: Randy Palamar
Date:   Thu, 23 Jan 2025 06:32:26 -0700

terminal: support DECST8C

This is useful for testing since it resets all tabstops to be 8 wide.

Diffstat:
M
terminal.c
 | 
18
+++++++++++++-----

1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/terminal.c b/terminal.c
@@ -387,7 +387,8 @@ next_tab_position(Term *t, b32 backwards)
 		u32 zeroes = clz_u32(t->tabs[idx--] & mask);
 		while (idx < ARRAY_COUNT(t->tabs) && zeroes == 32)
 			zeroes = clz_u32(t->tabs[idx--]);
-		result = 32 * (idx + 1) + 32 - zeroes;
+		result  = 32 * (idx + 1) + 32 - zeroes;
+		result *= col != 0;
 	} else {
 		u32 zeroes = ctz_u32(t->tabs[idx++] & ~mask);
 		while (idx < ARRAY_COUNT(t->tabs) && zeroes == 32)
@@ -412,6 +413,15 @@ term_tab_col(Term *t, u32 col, b32 set)
 }
 
 static void
+reset_tabs(Term *t, u32 column_step)
+{
+	for (u32 i = 0; i < ARRAY_COUNT(t->tabs); i++)
+		t->tabs[i] = 0;
+	for (u32 i = column_step; i < t->size.w; i += column_step)
+		term_tab_col(t, i, 1);
+}
+
+static void
 term_reset(Term *t)
 {
 	i32 mode = t->mode.term & TM_ALTSCREEN;
@@ -426,10 +436,7 @@ term_reset(Term *t)
 		swap_screen(t);
 		fb_clear_region(t, 0, t->size.h, 0, t->size.w);
 	}
-	for (u32 i = 0; i < ARRAY_COUNT(t->tabs); i++)
-		t->tabs[i] = 0;
-	for (u32 i = g_tabstop; i < t->size.w; i += g_tabstop)
-		term_tab_col(t, i, 1);
+	reset_tabs(t, g_tabstop);
 
 	t->top  = 0;
 	t->bot  = t->size.h - 1;
@@ -935,6 +942,7 @@ handle_csi(Term *t, CSI *csi)
 	case 'X': erase_characters(t, ORONE(csi->argv[0]));                  break;
 	case 'S': fb_scroll_up(t, t->top, ORONE(csi->argv[0]));              break;
 	case 'T': fb_scroll_down(t, t->top, ORONE(csi->argv[0]));            break;
+	case 'W': if (csi->priv) reset_tabs(t, 8); else goto unknown;        break;
 	case 'Z': push_tab(t, -(ORONE(csi->argv[0])));                       break;
 	case 'a': cursor_step_raw(t, ORONE(csi->argv[0]),  0,  1);           break;
 	case 'd': cursor_move_abs_to(t, csi->argv[0] - 1, p.x);              break;